Early growth, dominance acquisition and lifetime reproductive success in male and female cooperative meerkats

In polygynous species, variance in reproductive success is higher in males than females. There is consequently stronger selection for competitive traits in males and early growth can have a greater influence on later fitness in males than in females. As yet, little is known about sex differences in the effect of early growth on subsequent breeding success in species where variance in reproductive success is higher in females than males, and competitive traits are under stronger selection in females. Greater variance in reproductive success has been documented in several singular cooperative breeders. Here, we investigated consequences of early growth for later reproductive success in wild meerkats. We found that, despite the absence of dimorphism, females who exhibited faster growth until nutritional independence were more likely to become dominant, whereas early growth did not affect dominance acquisition in males. Among those individuals who attained dominance, there was no further influence of early growth on dominance tenure or lifetime reproductive success in males or females. These findings suggest that early growth effects on competitive abilities and fitness may reflect the intensity of intrasexual competition even in sexually monomorphic species.

[1]  Michael J. Crawley,et al.  The R book , 2022 .

[2]  T. Clutton‐Brock,et al.  Maternal investment during pregnancy in wild meerkats , 2013, Evolutionary Ecology.

[3]  T. Clutton‐Brock,et al.  No evidence for adaptive sex ratio variation in the cooperatively breeding meerkat, Suricata suricatta , 2013, Animal Behaviour.

[4]  T. Clutton‐Brock,et al.  Individual contributions to territory defence in a cooperative breeder: weighing up the benefits and costs , 2012, Proceedings of the Royal Society B: Biological Sciences.

[5]  L. Kruuk,et al.  Inbreeding and inbreeding depression of early life traits in a cooperative mammal , 2012, Molecular ecology.

[6]  Shinichi Nakagawa,et al.  Quantitative analysis of compensatory and catch-up growth in diverse taxa. , 2012, The Journal of animal ecology.

[7]  T. Clutton‐Brock,et al.  Lifetime growth in wild meerkats: incorporating life history and environmental factors into a standard growth model , 2012, Oecologia.

[8]  N. Metcalfe,et al.  The pattern of early growth trajectories affects adult breeding performance. , 2012, Ecology.

[9]  J. Bro-Jørgensen,et al.  Female competition and its evolutionary consequences in mammals , 2011, Biological reviews of the Cambridge Philosophical Society.

[10]  C. Kuzawa,et al.  Rapid weight gain after birth predicts life history and reproductive strategy in Filipino males , 2010, Proceedings of the National Academy of Sciences.

[11]  B. Sheldon,et al.  Sex Differences in the Persistence of Natal Environmental Effects on Life Histories , 2009, Current Biology.

[12]  Aaron Christ,et al.  Mixed Effects Models and Extensions in Ecology with R , 2009 .

[13]  Heiko G. Rödel,et al.  Features of the early juvenile development predict competitive performance in male European rabbits , 2009, Physiology & Behavior.

[14]  D. Bonte,et al.  Evolution of body condition‐dependent dispersal in metapopulations , 2009, Journal of evolutionary biology.

[15]  T. Clutton‐Brock.  Sexual selection in females , 2009, Animal Behaviour.

[16]  T. Clutton‐Brock,et al.  Group size and the suppression of subordinate reproduction in Kalahari meerkats , 2008, Animal Behaviour.

[17]  P. Monaghan.  Early growth conditions, phenotypic development and environmental change , 2008, Philosophical Transactions of the Royal Society B: Biological Sciences.

[18]  T. Clutton‐Brock,et al.  Factors affecting the reproductive success of dominant male meerkats , 2008, Molecular ecology.

[19]  N. Langmore,et al.  Maternal investment tactics in superb fairy-wrens , 2008, Proceedings of the Royal Society B: Biological Sciences.

[20]  T. Clutton‐Brock,et al.  Offspring competition and helper associations in cooperative meerkats , 2007, Animal Behaviour.

[21]  A. Cockburn,et al.  Reduced Egg Investment Can Conceal Helper Effects in Cooperatively Breeding Birds , 2007, Science.

[22]  T. Clutton‐Brock,et al.  Subordinate male meerkats prospect for extra-group paternity: alternative reproductive tactics in a cooperative mammal , 2007, Proceedings of the Royal Society B: Biological Sciences.

[23]  T. Clutton‐Brock,et al.  Helpers increase the reproductive potential of offspring in cooperative meerkats , 2007, Proceedings of the Royal Society B: Biological Sciences.

[24]  T. Clutton‐Brock,et al.  Intrasexual competition and sexual selection in cooperative mammals , 2006, Nature.

[25]  T. Clutton‐Brock,et al.  Infanticide by subordinates influences reproductive sharing in cooperatively breeding meerkats , 2006, Biology Letters.

[26]  Nigel C. Bennett,et al.  Stress and the suppression of subordinate reproduction in cooperatively breeding meerkats , 2006, Proceedings of the National Academy of Sciences.

[27]  T. Clutton‐Brock,et al.  Aggression and submission reflect reproductive conflict between females in cooperatively breeding meerkats Suricata suricatta , 2006, Behavioral Ecology and Sociobiology.

[28]  M. Hauber,et al.  Bateman's Principle in Cooperatively Breeding Vertebrates: The Effects of Non-breeding Alloparents on Variability in Female and Male Reproductive Success1 , 2005, Integrative and comparative biology.

[29]  L. Kruuk,et al.  Ontogenetic Patterns in Heritable Variation for Body Size: Using Random Regression Models in a Wild Ungulate Population , 2005, The American Naturalist.

[30]  T. Clutton‐Brock,et al.  Trade-offs between extraterritorial prospecting and helping in a cooperative mammal , 2005, Animal Behaviour.

[31]  T. Clutton‐Brock,et al.  Breeding success in cooperative meerkats: effects of helper number and maternal state , 2003 .

[32]  T. Clutton‐Brock,et al.  A genetic analysis of breeding success in the cooperative meerkat (Suricata suricatta) , 2003 .

[33]  A. Badyaev,et al.  Growing apart: an ontogenetic perspective on the evolution of sexual size dimorphism , 2002 .

[34]  T. Clutton‐Brock,et al.  Factors affecting pup growth and survival in co-operatively breeding meerkats , 2002 .

[35]  T. Clutton‐Brock,et al.  Early development, survival and reproduction in humans , 2002 .

[36]  M. Festa‐Bianchet,et al.  Sexual size dimorphism in bighorn sheep (Ovis canadensis): effects of population density , 2001 .

[37]  D. Réale,et al.  Early development, adult mass, and reproductive success in bighorn sheep. , 2000 .

[38]  J. Lindström,et al.  Early development and fitness in birds and mammals. , 1999, Trends in ecology & evolution.

[39]  L. Kruuk,et al.  Early determinants of lifetime reproductive success differ between the sexes in red deer , 1999, Proceedings of the Royal Society of London. Series B: Biological Sciences.

[40]  T. Clutton‐Brock,et al.  Infanticide and expulsion of females in a cooperative mammal , 1998, Proceedings of the Royal Society of London. Series B: Biological Sciences.

[41]  S. Emlen,et al.  Ecology, sexual selection, and the evolution of mating systems. , 1977, Science.

[42]  R Core Team,et al.  R: A language and environment for statistical computing. , 2014 .

[43]  Mitchel van Loon,et al.  Mixed effects models , 2013 .

[44]  John H. Maindonald,et al.  Comprar Data Analysis and Graphics Using R | John Maindonald | 9780521762939 | Cambridge University Press , 2010 .

[45]  J H Maindonald,et al.  Draft of Changes and Additions in a Projected 3rd Edition of Data Analysis and Graphics Using R , 2009 .

[46]  T. Clutton‐Brock,et al.  Determinants of reproductive success in dominant female meerkats. , 2008, The Journal of animal ecology.